Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-03-08
1991-07-02
Page, Thurman
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525221, 424467, 424480, 424487, 424497, 524521, C08L 3300
Patent
active
050286641
ABSTRACT:
A coating material for controlling drug release, useful for long acting formulations--e.g. for once-a-day administration, and to a long acting granular composition comprising a drug (especially one conventionally difficult to prepare in long acting form) coated with the coating material. This composition may be mixed with other granular drug formulations. The drug-release controlling coating material comprising, in a specific ration, one specific water-insoluble and low water-permeability polymers and two materials differing from each other in the pH-dependency of their solubility (pH-dependent polymer-materials).
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Fukui Muneo
Hosono Toshiharu
Kajiyama Atsushi
Ohmura Tadayoshi
Sugiura Hiroshi
Benston William E.
Page Thurman
Yamanouchi Pharmaceutical Co. Ltd.
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